http://www.packagekit.org/pk-using.html is a bit miss leading. It should redirect to http://www.packagekit.org/pk-faq.html#session-methods as that's what most people actually care about.
Author: Richard Hughes <firstname.lastname@example.org>
Date: Tue Feb 7 16:50:35 2012 +0000
Add a note to the website about the session helper API